“…Many lanthanide compounds have unusual physicochemical properties: record values of the magnetic moment, luminescence, and other properties valuable for practice. [1][2][3][4][5] Complex compounds of lanthanides are used as diagnostic tools, photo-, X-ray, and electroluminophores, and as other functional materials. [6][7][8][9][10] The magnetic properties of pure rare-earth (RE) elements and their alloys are diverse and interesting; therefore, a huge number of studies have been devoted to this issue.…”